ISSUED AT 07:55 FRIDAY DECEMBER 9VALID FROM : FRIDAY DECEMBER 9 ‑‑ UNTIL : WEDNESDAY DECEMBER 14 2016

GENERAL SYNOPSIS

Pressure field continues to show figures well above 1030 hpa over the Mediterranean Basin and the Alpine Range. This surface high pattern is being intensified due to the extension of an altitude subtropical mild air high ridge, Canary Islands to Central Alps, acting as a dome which blocks atmospheric exchanges, therefore increasing pollutants accumulation at lower altitudes and in the narrow mountain valleys as well, where cold air lakes remain stagnating. • Temperatures kept positive at 2000 m and above even at night. • Pressures possibly weakening somewhat on Saturday might allow for an inactive cold front to infiltrating from the north towards the Alps.